Fix description of regex quantifiers.

Submitted by: Carl van Tast <CvT@netway.at>
Reviewed by: Ralf S. Engelschall
PR: 5614


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@84578 13f79535-47bb-0310-9956-ffa450edef68